ABAP Select data from SAP table MPEV_COMP_ASSEMB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MPEV_COMP_ASSEMB table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to MPEV_COMP_ASSEMB. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the MPEV_COMP_ASSEMB table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_MPEV_COMP_ASSEMB TYPE STANDARD TABLE OF MPEV_COMP_ASSEMB,
      WA_MPEV_COMP_ASSEMB TYPE MPEV_COMP_ASSEMB,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <MPEV_COMP_ASSEMB> TYPE MPEV_COMP_ASSEMB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MPEV_COMP_ASSEMB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MPEV_COMP_ASSEMB
  INTO TABLE IT_MPEV_COMP_ASSEMB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPEV_COMP_ASSEMB
*  INTO TABLE @DATA(IT_MPEV_COMP_ASSEMB2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_MPEV_COMP_ASSEMB INDEX 1 INTO DATA(WA_MPEV_COMP_ASSEMB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MPEV_COMP_ASSEMB ASSIGNING <MPEV_COMP_ASSEMB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPEV_COMP_ASSEMB>-MANDT = 1.
<MPEV_COMP_ASSEMB>-ADOC_NUMBER = 1.
<MPEV_COMP_ASSEMB>-ADOC_ITEM = 1.
<MPEV_COMP_ASSEMB>-OAN_INSTANCE_ID = 1.
<MPEV_COMP_ASSEMB>-OAN_ELEMENT_NUMBER = 1.

ENDLOOP.

LOOP AT IT_MPEV_COMP_ASSEMB INTO WA_MPEV_COMP_ASSEMB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPEV_COMP_ASSEMB-PARENT_SFI_ID, sy-vline,
  WA_MPEV_COMP_ASSEMB-SFI_ID, sy-vline,
  WA_MPEV_COMP_ASSEMB-MATERIAL, sy-vline,
  WA_MPEV_COMP_ASSEMB-BATCH, sy-vline,
  WA_MPEV_COMP_ASSEMB-PL_QUANTITY, sy-vline,
  WA_MPEV_COMP_ASSEMB-QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPEV_COMP_ASSEMB you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_MPEV_COMP_ASSEMB TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_MPEV_COMP_ASSEMB INTO WA_MPEV_COMP_ASSEMB.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WEBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-WEBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-WEBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_COMP_ASSEMB-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_COMP_ASSEMB-AUFNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MPEV_COMP_ASSEMB_STR, 
MANDT TYPE STRING,
ADOC_NUMBER TYPE STRING,
ADOC_ITEM TYPE STRING,
OAN_INSTANCE_ID TYPE STRING,
OAN_ELEMENT_NUMBER TYPE STRING,
PARENT_SFI_ID TYPE STRING,
SFI_ID TYPE STRING,
MATERIAL TYPE STRING,
BATCH TYPE STRING,
PL_QUANTITY TYPE STRING,
QUANTITY TYPE STRING,
UOM TYPE STRING,
CRTN_USER TYPE STRING,
CRTN_TIME TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
GM_STATUS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLPO TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
IS_POSTED_RETROACTIVELY TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
EXEC_OAN_INSTANCE_ID TYPE STRING,
EXEC_OAN_ELEMENT_NUMBER TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
WEBLNR TYPE STRING,
WEBLPOS TYPE STRING,
INSMK TYPE STRING,
SHKZG TYPE STRING,
CRRTN_DOC_NUMBER TYPE STRING,
CRRTN_ITEM_TYPE TYPE STRING,
OAN_ID TYPE STRING,
OAN_VERSION_NO TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
SFI_CONF TYPE STRING,
CONF_ALLWD TYPE STRING,
CONF_NOT_ALLWD_RSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPEV_COMP_ASSEMB_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_MPEV_COMP_ASSEMB_STR-MANDT sy-vline 
WA_MPEV_COMP_ASSEMB_STR-ADOC_NUMBER sy-vline 
WA_MPEV_COMP_ASSEMB_STR-ADOC_ITEM sy-vline 
WA_MPEV_COMP_ASSEMB_STR-OAN_INSTANCE_ID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-OAN_ELEMENT_NUMBER sy-vline 
WA_MPEV_COMP_ASSEMB_STR-PARENT_SFI_ID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-SFI_ID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MATERIAL sy-vline 
WA_MPEV_COMP_ASSEMB_STR-BATCH sy-vline 
WA_MPEV_COMP_ASSEMB_STR-PL_QUANTITY sy-vline 
WA_MPEV_COMP_ASSEMB_STR-QUANTITY sy-vline 
WA_MPEV_COMP_ASSEMB_STR-UOM sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CRTN_USER sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CRTN_TIME sy-vline 
WA_MPEV_COMP_ASSEMB_STR-RSNUM sy-vline 
WA_MPEV_COMP_ASSEMB_STR-RSPOS sy-vline 
WA_MPEV_COMP_ASSEMB_STR-RSART sy-vline 
WA_MPEV_COMP_ASSEMB_STR-GM_STATUS sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGNO sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGTY sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGV1 sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGV2 sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGV3 sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MSGV4 sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MBLNR sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MJAHR sy-vline 
WA_MPEV_COMP_ASSEMB_STR-MBLPO sy-vline 
WA_MPEV_COMP_ASSEMB_STR-WERKS sy-vline 
WA_MPEV_COMP_ASSEMB_STR-LGORT sy-vline 
WA_MPEV_COMP_ASSEMB_STR-IS_POSTED_RETROACTIVELY sy-vline 
WA_MPEV_COMP_ASSEMB_STR-ERFMG sy-vline 
WA_MPEV_COMP_ASSEMB_STR-ERFME sy-vline 
WA_MPEV_COMP_ASSEMB_STR-EXEC_OAN_INSTANCE_ID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-EXEC_OAN_ELEMENT_NUMBER sy-vline 
WA_MPEV_COMP_ASSEMB_STR-VBELN sy-vline 
WA_MPEV_COMP_ASSEMB_STR-POSNR sy-vline 
WA_MPEV_COMP_ASSEMB_STR-WEBLNR sy-vline 
WA_MPEV_COMP_ASSEMB_STR-WEBLPOS sy-vline 
WA_MPEV_COMP_ASSEMB_STR-INSMK sy-vline 
WA_MPEV_COMP_ASSEMB_STR-SHKZG sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CRRTN_DOC_NUMBER sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CRRTN_ITEM_TYPE sy-vline 
WA_MPEV_COMP_ASSEMB_STR-OAN_ID sy-vline 
WA_MPEV_COMP_ASSEMB_STR-OAN_VERSION_NO sy-vline 
WA_MPEV_COMP_ASSEMB_STR-AUFNR sy-vline 
WA_MPEV_COMP_ASSEMB_STR-AUFPL sy-vline 
WA_MPEV_COMP_ASSEMB_STR-APLZL sy-vline 
WA_MPEV_COMP_ASSEMB_STR-SFI_CONF sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CONF_ALLWD sy-vline 
WA_MPEV_COMP_ASSEMB_STR-CONF_NOT_ALLWD_RSN sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.